Giraffe

The giraffe is the tallest animal on the planet, although it is not the heaviest. It can reach a height of 18 feet, making it well suited to life among the tall trees of Sub-Saharan Africa's arid savannas and acacia groves. The animal's large, prehensile tongue allows it to suck thorny branches into its mouth, where its teeth snip them off. Even the giraffe's tongue is very long and can reach 21-inch.

The giraffe drinks in the morning and evening then eats and chews its cud for the rest of the day. Splaying its front legs, bending its neck down, and managing its extremely high blood pressure so that its brain does not hemorrhage are all part of the drinking process. The giraffe's unusual physiology allows it to weigh up to 2 tons. They usually travel in small groups of about a half-dozen through the grasslands. Bulls fight by butting their long necks and heads against one another.

Weight: 2 tons